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He met many problems ______ he was going over his lessons.
#58104
A
before
B
as soon as
C
since
D
while
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—     is your grandmother?—She is 80years old.
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How
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How old
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Work hard, _______ you won’t do well in the exam.
#58161
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and
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but
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Jack,          ., or you will get heavier.
#57407
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doesn't play sports any more
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or
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 --_______ will the meeting last? --_______ they reach an agreement.
#55956
A
How long; Not until
B
When; Not until
C
How long; Until
D
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